DFIT interpretation has been a theme of the work that we’ve done within ResFrac. Our collaborative 2018 Industry Study, which culminated in one of the ‘Best of URTeC’ papers in
Dr. Egor Dontsov, Chief Scientist at ResFrac gave a presentation to the ARMA HFC Warm-Up Series entitled “Morphology of Simultaneously Propagating Hydraulic Fractures.” Current hydraulic fracture designs rely heavily on inducing multiple cracks within each stage. Field-scale hydraulic fracture simulations for such scenarios demonstrate that there are situations, in which fractures develop complex shapes, whereby each individual fracture has its own unique geometry that is very different from its neighbors. At the same time, for some other parameters, fracture morphology tends to be more regular and less complex, so that all the generated fractures are similar to each other. Several groups of researchers have observed such behavior. The common finding is that high fluid viscosity and/or low fracture toughness lead to simpler morphology, while low viscosity and/or high toughness cause fractures to develop complex shapes. In this talk, the problem of fracture morphology is addressed from a somewhat simplified viewpoint, yet the one allowing to better understand the key parameters that affect the behavior.
Apache used ResFrac to tightly constrain their Midland Basin pad models. Apache is a leader in gathering and interpreting advanced diagnostics. In SPE-204172, Shahri et al., describe the detailed calibrations possible with ResFrac and cross-well engineered fiber from Silixa. ResFrac outputs the full stress and strain tensors at any location in the model. These data can be used to directly compare to the strain rate data gathered from cross-well fiber-optic monitoring.
This paper was prepared for presentation at the SPE Hydraulic Fracturing Technology Conference and Exhibition to be held virtually on 4 – 6 May 2021. The official proceedings were published
For Office Hours this month, we had a presentation from Mark McClure entitled, “Direct Validation of DFIT Interpretations from In-Situ Strain Measurements,” reviewing a presentation he gave on April 11, 2022, at Saga Wisdom’s Sökkvabekkr conference in Austin, TX.
For this Office Hours, we continued the topic introduced by Professor Mark Zoback on the recent updates to the North American Stress Map with a presentation by ResFrac’s Ankush Singh on predicting stress profiles from log and lab data using the Viscoelastic Stress Relaxation (VSR) concept.